ONISCUS ASELLUS. 471 



Professor Kinahan to be occasionally met with near the 

 sea. 



This species is rarely found more than half an inch in 

 length, but we possess a specimen, of unknown locality, 

 measuring two-thirds of an inch. It is very common 

 throughout England, Scotland, and Ireland, under decay- 

 ing vegetable and animal matter, not only in damp, but 

 in the dryest localities. It is also common near the sea. 



It was formerly used in medicine, and was supposed to 

 cure agues, consumption, &c. It is commonly known 

 under the vulgar names of Pig's-louse, Sows, Woodlouse, 

 Millepede, or Carpenter. 



ONISCUS FOSSOR. 



Specific character. Oval, sub-depressed, covered with numerous rough 

 granulations, which give it a powdered appearance. Cephalon convex. 

 Lateral lobes moderate, rounded. Frontal line produced into a triangular 

 lobe. 



Length, five lines. 



Oniscusfossor. KOCH, Dtsch. Crust, h. 22, n. 22 ; and in H. SCHAFFER, 



Contin. Panz. Faun. Ins. Germ. 162, fol. 22. 



KINAHAN, Nat. Hist. Rev. vol. iv. 1857, p. 277, 



pi. xxi. figs. 5, 6, 7. 



Oniscus muscorum. LEREBOULLET, Mem. Strasbourg, iv. p. 29. 

 Porcellio tceniola. KOCH, Dtsch. Crust, h. 6, n. 2 ; and in H. SCHAFF. 



Cont. Panz. h. 139, n. 2 (var. ?). 

 Oniscus tceniola. Ibid. h. 180, n. 20, note, and fig. 6 (var. ?). 



THIS species so closely resembles the preceding, that 

 we have not considered it necessary to give a figure of 

 it, which, indeed, without colours, would scarcely show 

 its chief distinction, consisting in the much more 



